TG EAMCET (EAPCET) Physics Multiple Choice Questions (MCQs)

111. The AC voltage applied to a resistor produces:

• a) A constant current
• b) A current that is in phase with the voltage
• c) A current that lags behind the voltage
• d) A current that leads the voltage

Answer: b) A current that is in phase with the voltage

112. In an AC circuit, the phasor represents:

• a) The average voltage
• b) The instantaneous value of the voltage
• c) The amplitude and phase of the voltage or current
• d) The total power consumed

Answer: c) The amplitude and phase of the voltage or current

113. In a series LCR circuit, resonance occurs when:

• a) The inductive reactance is greater than the capacitive reactance
• b) The inductive reactance is equal to the capacitive reactance
• c) The capacitive reactance is greater than the inductive reactance
• d) The impedance of the circuit is minimum

Answer: b) The inductive reactance is equal to the capacitive reactance

114. The power factor in an AC circuit is defined as:

• a) The ratio of voltage to current
• b) The cosine of the phase difference between current and voltage
• c) The square of the amplitude of current
• d) The reciprocal of the impedance

Answer: b) The cosine of the phase difference between current and voltage

115. LC oscillations are associated with:

• a) Energy transfer between electric and magnetic fields
• b) Energy dissipation in the circuit
• c) A constant current flow
• d) A sinusoidal increase in current

Answer: a) Energy transfer between electric and magnetic fields

116. In a transformer, the voltage across the secondary coil is directly proportional to:

• a) The square of the turns ratio
• b) The primary coil current
• c) The number of turns in the primary coil
• d) The number of turns in the secondary coil

Answer: d) The number of turns in the secondary coil

117. The displacement current is associated with:

• a) Magnetic fields produced by moving charges
• b) The rate of change of electric flux
• c) The creation of static electric fields
• d) The movement of electrons in a conductor

Answer: b) The rate of change of electric flux

118. Which of the following is a characteristic of electromagnetic waves?

• a) They require a medium to propagate
• b) They travel only through solids
• c) They can travel through a vacuum
• d) They only travel in space

Answer: c) They can travel through a vacuum

119. The frequency of electromagnetic waves in the visible spectrum ranges from:

• a) 10 Hz to 10 kHz
• b) 3 × 10⁸ Hz to 3 × 10⁹ Hz
• c) 4 × 10¹⁴ Hz to 7 × 10¹⁴ Hz
• d) 1 × 10¹⁵ Hz to 1 × 10¹⁶ Hz

Answer: c) 4 × 10¹⁴ Hz to 7 × 10¹⁴ Hz

120. Which of the following electromagnetic waves has the highest frequency?

• a) Radio waves
• b) Microwaves
• c) X-rays
• d) Ultraviolet rays

Answer: c) X-rays