Class 11 - Physics Mock Tests

A Carnot engine operates between temperatures T1 = 600 K and T2 = 300 K. If the engine absorbs 3000 J of heat from the hot reservoir per cycle, the work done by the engine per cycle is:

A capacitor of 2 μF and 4 μF are connected in series across 12 V. Potential difference across 2 μF capacitor is:

A long straight wire carries a current of 10 A. The magnetic field at a distance of 0.1 m from the wire is: (μ₀ = 4π × 10⁻⁷ T·m/A)

The photoelectric work function of a metal is 2.0 eV. The threshold wavelength is approximately: (h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m/s, 1 eV = 1.6 × 10⁻¹⁹ J)

A Zener diode with a breakdown voltage of 6 V is used as a voltage regulator. The input voltage varies from 10 V to 16 V. The series resistance is 100 Ω and the Zener diode can handle a maximum current of 100 mA. The minimum load resistance for which the regulator works properly is:

The center of mass of two masses m1 and m2 at positions x1 and x2 is:

A metallic pendulum clock keeps correct time at 20°C. If the temperature rises to 40°C, the clock will: (coefficient of linear expansion of metal = 1.2 × 10⁻⁵ /°C)

A transformer has 100 turns in the primary and 200 turns in the secondary. If the primary voltage is 120 V AC, the secondary voltage is: