List of top Physics Questions on Current electricity asked in NEET (UG)

A constant voltage of 50 V is maintained between the points A and B of the circuit shown in the figure. The current through the branch CD of the circuit is :

The current passing through the battery in the given circuit, is:

A uniform wire of diameter $d$ carries a current of $100 \, \text{mA}$ when the mean drift velocity of electrons in the wire is $v$. For a wire of diameter $\frac{d}{2}$ of the same material to carry a current of $200 \, \text{mA}$, the mean drift velocity of electrons in the wire is

A uniform metal wire of length $l$ has 10 Ω resistance. Now this wire is stretched to a length $2l $ and then bent to form a perfect circle. The equivalent resistance across any arbitrary diameter of that circle is :

In an electrical circuit, the voltage is measured as V = (200 ± 4) volt and the current is measured as I = (20 ± 0.2) A. The value of the resistance is:

If the galvanometer G does not show any deflection in the circuit shown, the value of R is given by:

Resistance of a carbon resistor determined from colour codes is (22000±5%)Ω. The colour of third band must be:

The magnitude and direction of the current in the following circuit is

The resistance of platinum wire at 0°C is 2Ω and 6.89Ω at 80°C. The temperature coefficient of resistance of the wire is:

The effective resistance of a parallel connection that consists of four wires of equal length, equal area of cross-section, and same material is 0.25 Ω. What will be the effective resistance if they are connected in series?

Three resistors having resistances r₁, r₂ and r₃ are connected as shown in the given circuit. The ratio $\frac{i_3}{i_1}$ of currents in terms of resistances used in the circuit is

A Wheatstone bridge is used to determine the value of unknown resistance X by adjusting the variable resistance Y as shown in the figure. For the most precise measurement of X, the resistances P and Q:

Column - I gives certain physical terms associated with flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations.

Column I		Column II
A	Drift Velocity	P	$\frac{ m }{ ne ^{2} \rho}$
B	Electrical Resistivity	Q	$ne v_{ d }$
C	Relaxation Period	R	$\frac{ e E }{ m } \tau$
D	Current Density	S	$\frac{ E }{ J }$

In a potentiometer circuit a cell of EMF $1.5\, V$ gives balance point at $36\, cm$ length of wire. If another cell of EMF $2.5\, V$ replaces the first cell, then at what length of the wire, the balance point occurs ?

In a potentiometer circuit, a cell of EMF 1.5 V gives a balance point at 36 cm length of wire. If another cell of EMF 2.5V replaces the first cell, then at what length of the wire, the balance point occurs

Column - I gives certain physical terms associated with the flow of current through a metallic conductor. Column - II gives some mathematical relations involving electrical quantities. Match Column - I and Column - II with appropriate relations

Column - I		Column - II
(A)	Drift Velocity	(P)	$\frac{m}{ne^2\rho}$
(B)	Electrical Resistivity	(Q)	$nev_d$
(C)	Relaxation Period	(R)	$\frac{eE}{m}\tau$
(D)	Current Density	(S)	$\frac{E}{J}$

A resistance wire connected in the left gap of a metre bridge balances a $10\, \Omega$ resistance in the right gap at a point which divides the bridge wire in the ratio $3 : 2$. If the length of the resistance wire is $1.5\,m$, then the length of 1 $\Omega$ of the resistance wire is:

Which of the following graph represents the variation of resistivity $(\rho)$ with temperature (T) for copper ?

Which of the following acts as a circuit protection device ?

Which of the following acts as a circuit protection device?

The resistances in the two arms of the meter bridge are 5Ω and RΩ, respectively. When the resistance R is shunted with an equal resistance, the new balance point is at 1.6 l₁. The resistance 'R', is:

If voltage across a bulb rated $220 \,V$- $100\, W$ drops by $2.5\%$ of its rated value, the percentage of the rated value by which the power would decrease is

If power dissipated in the $9\, \Omega$ resistor in the circuit shown is $36$ watt, the potential difference across the $2\, \Omega$ resistor is

Kirchhoff's first and second laws of electrical circuits are consequences of

Two batteries,one of emf 18 V and internal resistance 2Ω and the other of emf 12 V and internal resistance 1Ω, are connected as shown.The voltmeter V will record a reading of :

Column I		Column II
A	Drift Velocity	P	\(\frac{ m }{ ne ^{2} \rho}\)
B	Electrical Resistivity	Q	\(ne v_{ d }\)
C	Relaxation Period	R	\(\frac{ e E }{ m } \tau\)
D	Current Density	S	\(\frac{ E }{ J }\)