A Best Way To Crack Gorenment Job Exams

Electrical Engineering Objective Questions { Electrostatics }

141. A capacitor having a capacitance of 40 IttF is connected across 250 V D.C. source. The charging current will be least
A. when capacitor is fully charged
B. when capacitor is half charged
C. when capacitor is almost 25% charged
D. initially
Discuss in Forum

142. A capacitance is a circuit component that opposes the change in circuit
A. current
B. voltage
C. impedance
D. none of the above
Discuss in Forum

143. If Q and C be the charge and capacity of a condenser, then the energy stored in the capacitor is given by
A. Q2/C2 2
B. ? c2Q2
C. Q2/C2
D. Q2/C1
Discuss in Forum

144. If the dielectric of a capacitor is replaced by a conducting material
A. the capacitance value of the capacitor will shoot upto very high value
B. the capacitor can store infinite charge
C. the plates will get short-circuited
D. the capacitor will get heated up due to eddy currents
Discuss in Forum

145. The electrons, in a dielectric, get detached from the atoms under
A. high current
B. high voltage
C. variable current
D. breakdown
Discuss in Forum

146. If C be the capacitance, V be the potential difference and I be the current,then ? will have the unit of CV
A. frequency
B. power
C. reactive power
D. time
Discuss in Forum

147. A ceramic and a mica capacitor have the same physical dimension. Which has the higher value of capacitance?
A. Ceramic capacitor
B. Mica capacitor
C. Both have identical value of capacitance
D. It is not possible to conclude on the basis of information supplied
Discuss in Forum

Page 21 of 22

« 19 20  21  22 »