physics class 10 chapter 2 notes

What is the power rating of a lamp connected to a 12V source when it carries a current of 2.5A?

In order to detect the current, galvanometer is connected _______

If we increase the temperature of a conductor, its resistance will_____

Electrical energy is commonly consumed in very large quantity and hence a large unit of energy is required which is known as ________

Electric potential and E.M.F ______________

The direction of the electronic current in the closed circuit is ________

The direction of conventional current flowing in a circuit is ________

If we increase the length of a wire to four times of its 2. length, what will be its resistance?

When ammeter is connected in the circuit, the positive terminal of ammeter should be connected with the _____

The SI unit of electric current is ____________

The current which always flows in one direction is called ______

When current I is flowing through a resistance R the electrical power that generates heat in the resistance is given by _________

In electrolyte, current is produced due to the flow of _____________

In order to measure the current in a circuit, ammeter should be connected ________

The resistance of a meter cube of the substance is called_______

The current constituted by negative charges flows from a point of ________

If a current I ampere flows through a resistance R in time seconds, then the energy supplied will be ______

• W =IRt
• W=I²Rt
• W= IR²t
• W=IRt²

Which Option is Correct ?

The potential drop across each of resistors will be same in ________

the conventional current of positive charges flows from a point of _________

Insulated covered wire is called__________

The electronic current is due to the flow of __________

The equivalent current of positive charges which flows through a conductor is known as ______

The SI unit of electrical power is _______

Energy is produced to transfer the electrons from positive terminal of the battery to the negative terminal by the _________

How will you calculate power from current (I) and voltage (v)?

• power =1/V
• power = VI
• power = V²I
• power = VI²

Which Option is Correct ?

The graphical representation of Ohm’s law is _________

A resistance which is connected with the galvanometer in order to convert it into ammeter should have _______

If we increase the cross-sectional area of the wire to double of its original area. It resistance will become_______

A small wire connected in series with the live wire is called ________

The resistance of a conductor does not depend on its________

If we double both the current and the voltage in a circuit while keeping its resistance constant, the power_____________

The energy supplied In driving one coulomb of charge round a complete circult in which the cell is connected is called __________

When Q coulomb of charge flows between the two points having potential difference of V volts then the energy in joules is represented by________

In liquids and gases, the current is due to the motion of ________

The energy supplied W = I²Rt is the mathematical expression for _______

The SI unit of specific resistance is _________

• Ω - m
• Ω – m
• Ω – m^-1
• Ω – m^-2

Which Option is Correct ?

The property of a substance which opposes the flow of current through it is called____

In electricity we assume that electric current is always flow due to the flow of _______

The series resistance which is connected with galvanometer to convert it into voltmeter usually has value in_____________

Kilowatt - hour is a unit of ______

Which of the following represents an electric current?

• Erg C^-1
• Cs^-1                      
• J S^-1
• Dyne S^-1

Which Option is Correct ?

When the temperature of a conductor is raised, its resistance _____________

If a charge ‘Q’ flows through any cross-section of the conductor in time ‘t’ second the current ‘I’ is given by ______

The wire at zero potential is called_____

The energy required to move a charge from one point to another in the circuit is called _____

The current due to negative charges and an equivalent current due to positive charges always flow in the __________

If the needle of galvanometer shows some deflection, it would indicate the _________

The resistances are connected end to end and provide only one path for current in ________

Ab electric current in conductors in due to the flow of _________

One watt is equal to_____

• Js
• Js^-1
• J²s
• sJ^-1

Which Option is Correct ?

The resistance of a conductor through which a current of one ampere is Mowing when the potential difference across its ends is one volt _______

A galvanometer is a very ______

Volt is a unit of_________

All electrical appliances are connected in parallel to each other between the main live and neutral wire to get ________

The Instrument with which we can detect the presence of current in a circuit ls known as ______

The wire grounded in the earth is called ___________

If 1 ampere current flows through 2-M long conductor, the charge flow through this in 1-hour will be _________

The potential difference can be directly measured by the instrument known as _______

Why should household appliances be connected in parallel with the voltage source?

The conventional current Is due to the flow of ___________

Heat energy dissipated in a resistor R when connected to a battery of V volts and current I ampere flowing through it for time t is given by __________

• I²R
• IRt
• VIt
• I²Rt

Which Option is Correct ?

Safety device used in place of fuse is _________

Ohm Is defined as ________

• Volt / Coulomb or VC^-1
• Volt/Ampere or VA^-1
• Ampere/Volt or AV^-1
• Ampere x Volt or A x V

Which Option is Correct ?

What is the voltage across a 6Ω resistor when 3A of current passes through it?

At a certain temperature, the resistance of a wire is directly proportional to its_____

Three resistance 5000, 500 and 50 ohms are connected in series across 555 volts mains. The current flowing through them will be _________

What happens to the intensity or the brightness of the lamps connected in series as more and more lamps are added?

If a potential of 220V is applied across a conductor and a current of 2A flu through it. What would be the resistance of the conductor?

The time interval after which the voltage repeats Its value is known as__________

When we connect a battery across a conductor, the energy is provided to the charges in the conductor by the _________

Voltmeter is always connected in a circuit in _______

Which one of the following bulbs has least resistance?

Ohm's Law Is applicable to ________

In parallel circuit, the magnitude of current that flows through each resistor will be _______

The resistance of an ammeter should be _________

Circuit breaker works on the principle of ____________

The combined resistance of two identical resistors, connected in series is 8 Ω. Their combined resistance in a parallel arrangement will be _______________

One kilowatt-hour Is equal to ____________

The wire at certain potential is called_________

One coulomb per second is equal to __________

The rate of flow of electric charge through any cross-sectional area is called ________

In metals, current is produced only due to the flow of_____________

The current through a metallic conductor is due to the motion of _________

When resistors are connected in series, the equivalent resistance is equal to ________

If three resistances of 60 each are connected in series combination. What will be the equivalent resistance?

If the resistance of 2-ohm and 4-ohm are connected in Parallel, the equivalent resistance will be _________

At a certain temperature, the resistance of a wire is inversely proportional to its_____

The value of current passing through a conductor is directly proportional to the_______

An additional wire used in devices having the metallic bodies is_______

If the resistors are connected in parallel, then ___________

The number of cycles completed by current in one second is called its_______

A good voltmeter is that which draws _______

Ohm Is the unit of ____________

The frequency of A.C used in our houses is _________

Electrical energy is measured in_____________

Free electrons are ______

When we double the voltage in a simple electric circuit, we double the __________

In series circuit, the magnitude of current that flows through each resistor is _________

Thermistor is_______

The current which changes its direction again and again is called_______

Batteries convert _______

The amount of energy supplied by current in unit time is known as _________

The relation V=IR represents_______