Class 12 Physics: CBSE Sample Question Paper- Term I (2021-22) with solutions

Which of the following is NOT the property of equipotential surface?

Two point charges + 8q and –2q are located at x = 0 and x = L respectively. The point on x axis at which net electric field is zero due to these charges is

An electric dipole of moment p is placed parallel to the uniform electric field. The amount of work done in rotating the dipole by 90° is

hree capacitors 2 µF, 3 µF and 6 µF are joined in series with each other.
The equivalent capacitance is:

Two point charges placed in a medium of dielectric constant 5 are at a distance r between them, experience an electrostatic force ‘F’. The electrostatic force between them in vacuum at the same distance r will be:

Which statement is true for Gauss law?

A capacitor plates are charged by a battery with ‘V’ volts. After charging, battery is disconnected and a dielectric slab with dielectric constant ‘K’ is inserted between its plates, the potential across the plates of a capacitor will become:

The best instrument for accurate measurement of EMF of a cell is

An electric current is passed through a circuit containing two wires of same material, connected in parallel. If the lengths and radii of the wires are in the ratio of 3 : 2 and 2 : 3, then the ratio of the current passing through the wire will be

By increasing the temperature, the specific resistance of a conductor and a semiconductor:

We use alloys for making standard resistors because they have:

A constant voltage is applied between the two ends of a uniform metallic wire, heat ‘H’ is developed in it. If another wire of the same material, double the radius and twice the length as compared to original wire is used, then the heat developed in it will be:

If the potential difference V applied across a conductor is increased to 2V with its temperature kept constant, the drift velocity of the free electrons in a conductor will:

The SI unit of magnetic field intensity is:

The equivalent resistance between A and B is ?

Two wires of the same length are shaped into a square of side 'a' and a circle with radius 'r'. If they carry same current, the ratio of their magnetic moment is:

The coil of a moving coil galvanometer is wound over a metal frame in order to:

The small angle between magnetic axis and geographic axis at a place is:

The horizontal component of earth’s magnetic field at a place is 3 times the vertical component. The angle of dip at that place is:

A conducting square loop of side 'L' and resistance 'R' moves in its plane with the uniform velocity 'v' perpendicular to one of its sides. A magnetic induction 'B' constant in time and space pointing perpendicular and into the plane of the loop exists everywhere as shown in the figure. The current induced in the loop is:

Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon the:

Which of the following graphs represent the variation of current(I) with frequency (f) in an AC circuit containing a pure capacitor?

The magnetic flux linked with the coil (in Weber) is given by the equation:
φ = 5t² + 3t + 16 The induced EMF in the coil at time, t = 4 will be:

The instantaneous values of emf and the current in a series ac circuit are: E = E_o sin ωt and I = I_o sin (ωt + π/3) respectively, then it is

A 20 volt AC is applied to a circuit consisting of a resistance and a coil with negligible resistance. If the voltage across the resistance is 12 volt, the voltage across the coil is:

Electrostatic force between two charged particles in air is F. If charges are placed at the same distance in brass, what will be the force?

If the electric field is . Electric flux through a surface area 10 units lying in X-Y plane is

Work done in moving an electron from one point to another on an equipotential surface of 10 Volt potential

Electric potential at a point (x, y, z) in vacuum is V = 3x² volt. Find the electric field intensity at the point (1m, 2m, 3m) . 

Two copper wires of same length, having different cross-sectional area in the ratio 1:3, are connected in series. The ratio of their drift velocities v_d will be