List of top Physics Questions on Current electricity asked in BITSAT

Three resistors of $ 2\, \Omega $, $ 3\, \Omega $, and $ 6\, \Omega $ are connected in parallel. What is the equivalent resistance of the combination?

A wire is connected to a battery between the points M and N as shown in figure
(1). The same wire is bent in the form of a square and then connected to the battery between the points M and N as shown in figure
(2). Which of the following quantities increases?

In the circuit shown in figure, the current through the given resistor is

In the circuit given below, V(t) is the sinusoidal voltage source. Voltage drop VAB(t) across the resistance R is

An inductor of inductance L = 400mH and resistors of resistance R₁ = 2Ω and R₂ = 2Ω are connected to a battery of emf 12V as shown in the figure. The internal resistance of the battery is negligible. The switch S is closed at t=0. The potential drop across R₁ as a function of time is:

In the circuit shown in the figure, find the current in the 45Ω resistor.

In the shown arrangement of the experiment of the meter bridge, if AC corresponding to null deflection of galvanometer is x, what would be its value if the radius of the wire AB is doubled?

The drift velocity of electrons in a silver wire with cross-sectional area 3.14×10⁻6m² carrying a current of 20A is. Atomic weight of Ag = 108, density of silver = 10.5×10³kg m⁻3.

A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if

A direct current of 5A is superposed on an alternating current I = 10sin ω t flowing through a wire. The effective value of the resulting current will be

A 10V battery with internal resistance 1Ω and a 15V battery with internal resistance 0.6Ω are connected in parallel to a voltmeter (see figure). The reading in the voltmeter will be close to:

Seven resistances, each of value 20Ω, are connected to a 2V battery as shown. The ammeter reading will be:

A meter bridge is set up as shown to determine an unknown resistance X using a standard 10 ohm resistor. The galvanometer shows null point at 52 cm mark. The end corrections are 1 cm and 2 cm respectively for the ends A and B. The determined value of X is

A wire is connected to a battery between the points M and N as shown in figure (1). The same wire is bent in the form of a square and then connected to the battery between the points M and N as shown in figure (2). Which of the following quantities increases?

In the circuit shown in the figure the current through the resistor is

In the shown arrangement of the meter bridge AC corresponding to null deflection of galvanometer is x. What would be its value if the radius of the wire AB is doubled?

An inductor of inductance L = 400mH and resistors of resistance R₁ = 2Ω and R₂ = 2Ω are connected to a battery of emf 12V as shown in the figure. The internal resistance of the battery is negligible. The switch S is closed at t = 0. The potential drop across L as a function of time is:

In the circuit shown in the figure, find the current in the 45Ω resistor.

The drift velocity of electrons in a silver wire with cross–sectional area 3.14×10⁻6m² carrying a current of 20A is to be calculated. Given: atomic weight of Ag =108, density of silver =10.5×10³kg m⁻3.

A constant voltage is applied between the two ends of a uniform metallic wire. Some heat is developed in it. The heat developed is doubled if:

A direct current of $5\text{ A}$ is superposed on an alternating current $I=10\sin\omega t$ flowing through the same wire. The effective value of the resulting current will be:

For the circuit shown, the current is to be measured. The ammeter shown is a galvanometer with resistance $R_g = 60.00\,\Omega$ converted into an ammeter by a shunt resistance $R_s = 0.02\,\Omega$. The value of the current is: