List of top Physics Questions on Current electricity asked in MHT CET

The value of current \( I \) in the given current distribution is

A copper wire of length \( L \) and diameter \( D \) is to be reshaped into another wire so as to have minimum resistance. For this we should

Scale of galvanometer divided into 100 equal divisions has a current sensitivity 10 div/mA and voltage sensitivity 4 div/mV. The resistance of the galvanometer is

A potentiometer wire has length 4 m and resistance 5 \( \Omega \). It is connected in series with 495 \( \Omega \) resistance and a cell of e.m.f. 4V. The potential gradient along the wire is

A galvanometer has resistance \( G \) and range \( V_g \). How much resistance is required to read voltage up to \( V \) volts?

In the following network, the current flowing through 15 $\Omega$ resistance is

A wire of length 3 m connected in the left gap of a meter-bridge balances 8$\Omega$ resistance in the right gap at a point, which divides the bridge wire in the ratio 3: 2. The length of the wire corresponding to resistance of 1$\Omega$ is

For measurement of potential difference, potentiometer is preferred in comparison to voltmeter because

A $ 2V $ battery, a $ 990 \, \Omega $ resistor and a potentiometer of $ 2m $ length, all are connected in series of the resistance of potentiometer wire is $ 10 \, \Omega $ , then the potential gradient of the potentiometer wire is

Potentiometer measures the potential difference more accurately than a voltmeter because

Two similar waves ' $x$ ' and ' $y$ ' of amplitude 'a' are moving in the same direction and superimposed. If the wave ' $y$ ' is lagging behind the wave ' $x$ ' by one-fourth of the cycle, then the amplitude of the resultant wave is equal to: