Physics Test - ...

Identify the process in which an electron escapes from the metal surface.

Choose the correct answer from the options given below:

Faraday’s Law of Induction is represented as ______.

Read the following statements and choose the correct option:

Assertion (A): Electric current is a vector quantity.

Reason (R): Electric current is a quantity having magnitude as well as direction.

Which of the following statements are true regarding Biot – Savart’s law?

(i) According to biot – savart’s law magnetic field is directly proportional to the length of the element.

(ii) Biot – Savart’s law deals with electric field.

(iii) Magnetic field is directly proportional to current through the conductor.

A capacitor of capacitance C is fully charged by a 200 V supply. It is then discharged through a small coil of resistance wire embedded in a thermally insulated block of specific heat 2.5×10²Jkg⁻¹K⁻¹ and of mass 0.1 kg. If the temperature of the block rises by 0.4 K, what is the value of C?

64 water drops having equal charges combine to form one bigger drop. The capacitance of the bigger drop, as compared to that of smaller drop will be:

An electrolytic capacitor is marked 8 μF, 220 V. It can be used in a circuit where the p.d. across the capacitor may be:

The capacitance of a parallel plate capacitor is 5 μF. When a glass slab of thickness equal to the separation between the plates is introduced between the plates, the potential difference reduces to 1/8 of the original value. The dielectric constant of glass is

For a parallel plate capacitor ______________ possible potential difference between the capacitor plates.