List of top Physics Questions on Current electricity asked in COMEDK UGET

A wire of resistance 5 ohms is stretched such that longitudinal strain is $200 \%$.The new resistance in ohms is
At the instant, when potentiometer is balanced, current
A heating coil takes 6 min to boil certain amount of milk. Another heating coil takes 3 min to boil same amount of milk. Supply voltage is same. When the coils are connected in parallel, time taken to boil same amount of milk is
A high resistance voltmeter connected across a cell reads 2 volts. When a resistance of $19 \, \Omega$ is connected in the cell circuit, voltmeter reading drops to $1.9$ volts. The internal resistance of the-cell is
A wire is stretched such that its length -increases by $0.2 \%$. Its resistance
An electric lamp marked $60 \, W-220 \, V$ is used on an average $5$ hours a day in a month of $30$ days. Cost of electric power consumed at the rate of Rs. 2 per unit is
Instrument used to measure e.m.f. of the cell accurately is
When a current flows through a conductor, there will be increase in temperature. This is mainly due to
Two concentric circular loops of radii $0.08 \, m$ and $0.1 \, m$ carry currents such that magnetic field at the centre is zero. If the current in the outer loop is $8 \, A$ clockwise, current in the inner loop is
In a potentiometer experiment, two cells of emf $E_1$ and $E_2$ are used in series in the secondary circuit. The balancing length is found to be 58 cm. If the polarity of $E_2$ is reversed, the balancing length becomes 29 cm. The ratio $E_1/E_2$ of the emfs of two cells is :
In the circuit shown, the magnitude and direction of the flow of current is
A 5.0 amp current is setup in an external by a 6.0 volt storage battery for 6.0 minutes. The chemical energy of the battery is reduced by ....