Himachal Pradesh HPTET N-2513 - Free Online Practice Test

101. Carnot engine efficiency (400K,300K) A. 1 B. 0.75 C. 0.333 D. 0.25

102. Pendulum length increased 2%, time period A. 0.02 B. -0.02 C. 0.01 D. -0.01

103. Sound wave y = 0.0015 sin (62.8x + 314t), wavelength A. 0.1 B. 0.2 C. 0.3 D. None

104. Watch taken to moon will A. No change B. Not work C. Runs slowly D. Runs faster

105. he work done in placing a charge of 8×10⁻¹⁸ C on a capacitor of 100 microfarad is A. 6×10⁻³² J B. 3.1×10⁻²⁶ J C. 4×10⁻¹⁰ J D. 32×10⁻³² J

106. Torque acting on electric dipole of dipole moment p placed in uniform electric field E is A. p × E B. p . E C. p × (E × p) D. p . E / p²

107. The energy stored in a capacitor of capacitance C and potential V A. ½ C²V B. ½ V²C C. ½ CV D. ½ C²V²

108. In bringing one electron towards another, the electrostatic potential energy A. increases B. decreases C. remains same D. becomes zero

109. If length and radius of a wire are both doubled, resistance of the wire becomes A. resistance doubled & resistivity halved B. resistance halved & resistivity same C. resistance halved & resistivity doubled D. both unchanged

110. If an ammeter is used instead of a voltmeter, it must be connected A. low resistance in parallel B. high resistance in parallel C. very high resistance in series D. low resistance in series