Home Physics Alternating Current Test Online Preparation Mcqs Physics Alternating Current Test Online Preparation Mcqs Physics Alternating Current Test Online Preparation Mcqs With Answers Start Below 123456789101112131415Show paginator Hide paginator 7% Question 1 of 15 1. In capacitive circuit, the current _________.A. Leads forward the voltage by π/2B. Opposite in phase of voltage by πC. Is in phase with voltageD. Lags behind voltage by π/2Question 1 of 15 Loading... Question 2 of 15 2. An alternating current of r.m.s value of 4.0 A and frequency 50Hz flows in a circuit containing 10Ω resistor. The peak current is then ______.A. 6.66AB. 20.66AC. 5.66AD. 20AQuestion 2 of 15 Loading... Question 3 of 15 3. Electromagnetic waves consists of _________.A. HeatB. NoneC. EnergyD. MassQuestion 3 of 15 Loading... Question 4 of 15 4. An inductive coil has a resistance of 100Ω. When an AC signal of frequency 1000Hz is fed to the coil, the applied voltage leads the current by 45°. What is the inductance of the coil?A. 20mHB. 10mHC. 16mHD. 12mHQuestion 4 of 15 Loading... Question 5 of 15 5. An ideal choke would beA. Combination of inductor and capacitorB. Pure capacitorC. Pure resistorD. Pure inductorQuestion 5 of 15 Loading... Question 6 of 15 6. The value of the steady current, which when flowing through the same resistor produces heat at the same rate as the mean rate of heat produced by the alternating current, is _______A. Average currentB. Sinusoidal currentC. r.m.s currentD. Net currentQuestion 6 of 15 Loading... Question 7 of 15 7. The frequency of a circuit consisting of a capacitance C and resistor R is ________.A. 1/RCB. R/CC. C/RD. 1/√RCQuestion 7 of 15 Loading... Question 8 of 15 8. An A.C series circuit contain 4Ω resistance and 3-Ω inductive resistance. The impedance of the circuit is:A. 5 ΩB. 1 ΩC. 7/√2ΩD. 7 ΩQuestion 8 of 15 Loading... Question 9 of 15 9. In an LCR series circuit, if V is the effective value of the applied voltage, VR is the voltage across R, VL is the effective voltage across L & Vc is the effective voltage across C thenA. V2 = VL2 + (VR - Vc)2B. V2 = VR2 + (VL - Vc)2C. V = VR+VL+VcD. V2 = VR2 + VL2 + Vc2Question 9 of 15 Loading... Question 10 of 15 10. Waves emitted from the antenna are ________.A. Sound wavesB. Modulated wavesC. Electromagnetic wavesD. Radio wavesQuestion 10 of 15 Loading... Question 11 of 15 11. Electromagnetic waves travel in free space with the speed of _______.A. Cathode raysB. Positive raysC. β raysD. γ raysQuestion 11 of 15 Loading... Question 12 of 15 12. At resonance the value of the power factor in an L-C-R series circuit is ______A. ½B. Not definiteC. ZeroD. 1Question 12 of 15 Loading... Question 13 of 15 13. To find the r.m.s value of an alternating current mathematically, we need to have ______A. Square root of I2B. Square of I2C. Mean value of I2D. Square root of mean value of I2Question 13 of 15 Loading... Question 14 of 15 14. A 10Ω electric heater is connected to a 220V, 50Hz mains supply. What is the peak value of the potential difference across the heater element?A. 220/√2VB. 220√2VC. 220VD. 110VQuestion 14 of 15 Loading... Question 15 of 15 15. A wire of resistance R is coil inductivity so that its inductance is L. The impedance of the coil at a frequency of f is:A. (R2+4π2f2L2)1/2B. R+1/2πfLC. (R+2πfL)1/2D. (R2+f2L2)1/2Question 15 of 15 Loading... Loading... Related Study Posts:MDCAT Test Physics Test Online PreparationASF Written Test Preparation Online McqsOnline ECAT Test Preparation McqsFPSC SST Test Preparation Mcqs OnlinePPSC Lecturer Test Preparation Online McqsLecturer Test KPPSC Preparation Mcqs OnlineTESCO Jobs Online NTS Test Preparation McqsFIA ASI Sub Inspectors Job 2024 OTS Test Preparation…SPSC SST Test Preparation Mcqs Online with SyllabusFPSC Test Preparation Mcqs Online Subject Wise