Question:
A 200 V, 50 Hz, 1-phase energy meter makes 960 revolutions to supply a load of 0.8 pf for 2 hrs.
If motor constant is 160 rev/kWh, then load current is:
A 200 V, 50 Hz, 1-phase energy meter makes 960 revolutions to supply a load of 0.8 pf for 2 hrs.
If motor constant is 160 rev/kWh, then load current is:
Show Hint
Use energy meter formula: Energy = \( \frac{\text{Revolutions}}{\text{rev/kWh}} \).
Then apply: \( P = VI\cos\phi \).
Updated On: May 23, 2025
- 1.875 A
- 15 A
- 18.75 A
- 37.5 A
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Energy recorded = \( \frac{960}{160} = 6 \text{ kWh} \)
Time = 2 hrs → Power = \( \frac{6}{2} = 3 \text{ kW} \)
Using \( P = VI\cos\phi \Rightarrow I = \frac{3000}{200 \times 0.8} = 18.75 \, \text{A} \)
Was this answer helpful?
0
0
Top TS PGECET Electrical Engineering Questions
- A 1-$\phi$, RC series circuit has \( R = 5\, \Omega \) and \( C = 10\, \mu F \). If the angular frequency of current is 20000 rad/sec, then the applied voltage
- A source voltage of 100 V dc is applied across a RLC series circuit. Under steady-state conditions, voltages across each element is
- The equivalent inductance of two equal inductances when connected in series aiding is 14 H and when connected in series opposing is 6 H. What is the coefficient of coupling?
- Certain resistors connected in parallel and the equivalent resistance is \( X \). If one of the resistances is removed the equivalent resistance is \( Y \). What is the conductance value of removed resistance?
For an input voltage \( v = 10 \sin 1000t \), the Thevenin's impedance at the terminals X and Y for the following circuit is
View More Questions
Top TS PGECET Electrical and Electronic Measurements Questions
- A 50 V reading in a 0 – 150 V range Voltmeter has an error of 1.25 V. Find the % error of full-scale reading.
- A 4½ digit digital voltmeter would display a reading of 0.6794 V in 10 V range as:
- With fixed dimensions of Cathode Ray Tube (C.R.T), the ratio of electrostatic deflection sensitivity to magnetic deflection sensitivity, if the accelerating voltage is 10 kV, is:
- A dc ammeter has a multiplication factor of 8 and its shunt current is 17.5 A, then the current through ammeter is:
- If \( I_p, I_m, I_s \) are magnetising, primary and secondary currents of current transformer, then approximate phase angle \( \theta \) in degrees between \( I_p \) and reversed \( I_s \) is:
View More Questions
Top TS PGECET Questions
- If \( P = \begin{pmatrix} 1 & 1 & 1 \\ 0 & 1 & 2 \\ 0 & 0 & 1 \end{pmatrix} \) is the modal matrix of \( A = \begin{pmatrix} 1 & 1 & 0 \\ 0 & 2 & 2 \\ 0 & 0 & 3 \end{pmatrix} \) then the sum of all the elements of \( P^{-1}AP \) is
- If the system of equations \( kx + y + z = k - 1 \), \( x + ky + z = k - 1 \), and \( x + y + kz = k - 1 \) has infinite solutions, then \( k \) is
- The value of the integral \( \int_C (2xy - x^2) \, dx + (x^2 + y^2) \, dy \) where \( C \) is the boundary of the region enclosed by \( y = x^2 \) and \( y^2 = x \), described in the positive sense, is
- Let \( f(x) = \log x \). The number \( C \) strictly between \( e^2 \) and \( e^3 \) such that its reciprocal is equal to \( \frac{f(e^3) - f(e^2)}{e^3 - e^2} \) is
- The solution of the differential equation \( (D^2 + 2)y = x^2 \) is
View More Questions