Major Competitive Exams

Q. In a parallel circuit with three resistors of values 2Ω, 3Ω, and 6Ω, what is the equivalent resistance?
  • A.
  • B.
  • C.
  • D.
Q. In a parallel circuit with three resistors of values 6 ohms, 3 ohms, and 2 ohms, what is the equivalent resistance?
  • A. 1.5 ohms
  • B. 2 ohms
  • C. 2.5 ohms
  • D. 3 ohms
Q. In a parallel circuit with three resistors R1 = 2Ω, R2 = 3Ω, and R3 = 6Ω, what is the equivalent resistance?
  • A.
  • B.
  • C.
  • D.
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the equivalent resistance?
  • A. 2.4 ohms
  • B. 10 ohms
  • C. 24 ohms
  • D. 12 ohms
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the total current if the voltage across the circuit is 12V?
  • A. 2 A
  • B. 3 A
  • C. 4 A
  • D. 5 A
Q. In a parallel circuit with two resistors of 4 ohms and 6 ohms, what is the total current if the voltage across the circuit is 12 V?
  • A. 2 A
  • B. 3 A
  • C. 4 A
  • D. 5 A
Q. In a parallel circuit with two resistors of 4Ω and 6Ω, what is the total current if the voltage across the circuit is 12V?
  • A. 2A
  • B. 3A
  • C. 4A
  • D. 6A
Q. In a parallel circuit with two resistors of 6 ohms and 3 ohms, what is the equivalent resistance?
  • A. 2 ohms
  • B. 4 ohms
  • C. 1.5 ohms
  • D. 9 ohms
Q. In a parallel circuit with two resistors R1 = 6Ω and R2 = 3Ω, what is the equivalent resistance?
  • A.
  • B.
  • C. 1.5Ω
  • D.
Q. In a parallel circuit, if one resistor fails, what happens to the total current?
  • A. It increases.
  • B. It decreases.
  • C. It remains the same.
  • D. It becomes zero.
Q. In a parallel circuit, if one resistor is removed, what happens to the total resistance?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes infinite
Q. In a parallel combination of capacitors, how is the total capacitance calculated?
  • A. C_eq = C1 + C2 + C3
  • B. 1/C_eq = 1/C1 + 1/C2 + 1/C3
  • C. C_eq = 1/(C1 + C2 + C3)
  • D. C_eq = C1 * C2 * C3
Q. In a parallel plate capacitor, if the area of the plates is doubled while keeping the separation constant, what happens to the capacitance?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a parallel plate capacitor, if the distance between the plates is doubled while keeping the charge constant, what happens to the electric potential?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It quadruples
Q. In a parallel plate capacitor, if the distance between the plates is halved, what happens to the capacitance?
  • A. It halves
  • B. It doubles
  • C. It remains the same
  • D. It quadruples
Q. In a parallel RLC circuit, what happens to the total current if the frequency is increased?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Depends on R
Q. In a photoelectric effect experiment, increasing the intensity of light increases the number of emitted electrons. What does this imply?
  • A. Light is a wave
  • B. Light is a particle
  • C. Energy of each photon increases
  • D. Number of photons increases
Q. In a photoelectric experiment, if the frequency of light is just above the threshold frequency, what can be said about the emitted electrons?
  • A. They have maximum kinetic energy
  • B. They are emitted with zero kinetic energy
  • C. They are emitted with high kinetic energy
  • D. No electrons are emitted
Q. In a photoelectric experiment, if the stopping potential is increased, what does it indicate about the emitted electrons?
  • A. They have higher kinetic energy
  • B. They have lower kinetic energy
  • C. They are emitted at a lower rate
  • D. They are not emitted
Q. In a photoelectric experiment, if the stopping potential is increased, what happens to the energy of the emitted electrons?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes negative
Q. In a photoelectric experiment, if the stopping potential is increased, what happens to the maximum kinetic energy of the emitted electrons?
  • A. It increases
  • B. It decreases
  • C. It remains the same
  • D. It becomes zero
Q. In a photoelectric experiment, if the stopping potential is increased, what happens to the current?
  • A. It increases
  • B. It decreases
  • C. It remains constant
  • D. It becomes zero
Q. In a physics experiment, the force applied is measured as 50 N with an uncertainty of ±1 N. What is the relative uncertainty in the force measurement?
  • A. 0.02
  • B. 0.01
  • C. 0.005
  • D. 0.1
Q. In a physics experiment, the speed of an object is measured as 20.0 m/s with an uncertainty of ±0.4 m/s. What is the maximum possible error in the kinetic energy calculated from this speed?
  • A. 8 J
  • B. 4 J
  • C. 2 J
  • D. 1 J
Q. In a plane mirror, if an object is placed 10 cm in front of the mirror, where will the image be formed?
  • A. 5 cm
  • B. 10 cm
  • C. 15 cm
  • D. 20 cm
Q. In a potentiometer circuit, if the balancing length is 50 cm for a cell of emf 1.5V, what is the potential gradient if the total length of the wire is 100 cm?
  • A. 3 V/m
  • B. 1.5 V/m
  • C. 0.75 V/m
  • D. 2 V/m
Q. In a potentiometer circuit, if the length of the wire is doubled while keeping the potential difference constant, what happens to the potential gradient?
  • A. It doubles
  • B. It halves
  • C. It remains the same
  • D. It becomes zero
Q. In a potentiometer circuit, if the length of the wire is doubled, what happens to the potential difference across the wire?
  • A. It doubles.
  • B. It halves.
  • C. It remains the same.
  • D. It quadruples.
Q. In a potentiometer circuit, if the length of the wire is doubled, what happens to the potential gradient?
  • A. It doubles.
  • B. It halves.
  • C. It remains the same.
  • D. It quadruples.
Q. In a potentiometer experiment, if the balance point is found at 4 m for a cell of unknown emf, what is the emf if the potential gradient is 2 V/m?
  • A. 4 V
  • B. 6 V
  • C. 8 V
  • D. 10 V
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