Electricity

$1$ Ampere of current is equivalent to:

The electric potential at infinity is traditionally taken as:

Which component is represented by the symbol of a circle with an 'A' and polarity signs ($+$ and $-$)?

The unit 'Volt' is equivalent to which of the following?

If the current in a circuit is halved while resistance is kept constant, the potential difference across the circuit will:

Which of the following is used to maintain a constant potential difference across a conductor?

If the length of a wire is doubled but the material remains the same, what happens to its resistivity?

If the cross-sectional area of a wire is doubled, what happens to its resistance?

The total resistance of a wire depends on:

In a parallel circuit, if the resistance of one branch is increased, the total current in the main circuit:

If three $30 \Omega$ resistors are connected in parallel, the total resistance is:

Which connection is preferred to ensure that all appliances get the full voltage of the mains supply?

Which of the following is NOT a practical application of the heating effect of current?

The filament of an electric bulb is thin because a thin wire has:

One Joule is equal to:

In the SI system, power is measured in Watts. What does one Watt represent in terms of energy conversion?

An electric iron draws $5 A$ current at $220 V$. Its power is:

If a heater of $1500 W$ is used for a very short time, the rate at which it consumes energy is:

If the current $I$ in a circuit is $1 A$ and the voltage $V$ is $1 V$, the power $P$ is:

What is the equivalent of $1$ Kilowatt in Watts?

The power of a circuit is $10 W$ when the current is $2 A$. What is the resistance?