SSC JE Electrical 2019 with solution SET-1 Relate ‘Reluctance with the following: Weber/m A/m Weber/A A-T/Weber Weber/m A/m Weber/A A-T/Weber ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The reluctance of any part of a magnetic circuit may be defined as the ratio of the drop in magnetomotive force to the flux produced in that part of the circuit. It is measured in ampere-turns/Weber and is denoted by S.Reluctance = m.m.f ⁄ flux
SSC JE Electrical 2019 with solution SET-1 Find the net capacitance of the combination in which ten capacitors of 10 μF are connected in parallel 100 μF 50 μF 0.1 μF 1 μF 100 μF 50 μF 0.1 μF 1 μF ANSWER EXPLANATION DOWNLOAD EXAMIANS APP When the capacitance is connected in series the total capacitance is given byCeq = C1 + C2 + C3………CNCeq = 10nCeq =10 × 10 = 100 μF
SSC JE Electrical 2019 with solution SET-1 Identify the important feature of a DC series motor High starting torque Medium starting torque Zero starting torque Low starting torque High starting torque Medium starting torque Zero starting torque Low starting torque ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In DC series motor Torque (Ta) increase as the Square of armature current (Ia) Ta ∝ Ia2. So DC motor provides high starting torque.
SSC JE Electrical 2019 with solution SET-1 In the two wattmeter method, the readings of the two wattmeters are 500W, 500W respectively. The load power factor in a balanced 3-phase 3-wire circuit is: 1 0.8 0.9 0.5 1 0.8 0.9 0.5 ANSWER EXPLANATION DOWNLOAD EXAMIANS APP In two wattmeter method the phase angle is tanφ = √3(W1 − W2)/(W1 + W2) tanφ = √3(500 − 500)/(500 + 500) tanφ = 0° φ = tan−10° = 0° Power factor = cosφ PF = cos0° = 1
SSC JE Electrical 2019 with solution SET-1 The direction of the arrow represents the direction of when the diode is forward biased P-type material Conventional current flow N-type material P-N Junction P-type material Conventional current flow N-type material P-N Junction ANSWER EXPLANATION DOWNLOAD EXAMIANS APP The direction of the arrow represents the direction of the conventional current flow when the diode is forward biased.
SSC JE Electrical 2019 with solution SET-1 Identify the INCORRECT statement with regards to synchronous motors It is a constant speed motor It is a self-starting machine The field winding is placed on the rotor The armature winding is placed on the stator It is a constant speed motor It is a self-starting machine The field winding is placed on the rotor The armature winding is placed on the stator ANSWER EXPLANATION DOWNLOAD EXAMIANS APP A synchronous motor is not a self-starting motor. You can check out this article why synchronous motor is not self starting
EXAMIANS