Mica capacitors are characterized by all of the following except___________?
A. stable operation
B. accurate value
C. low leakage reactance
D. low losses
Month: December 2018
An uncharged conductor is placed near a charged conductor, then_____________?
An uncharged conductor is placed near a charged conductor, then_____________?
A. the uncharged conductor gets charged by conduction
B. the uncharged conductor gets charged by induction and then attracted towards the charging body
C. the uncharged conductor is attracted first and then charged by induction
D. it remains as such
Paper condenser is___________?
Paper condenser is___________?
A. always polarised
B. usually of fixed value
C. electrolytic condenser
D. a variable condenser
Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
Out of the following capacitors of identical rating which one will have the smallest dimensions ___________ ?
A. Aluminium foil capacitor
B. Mica capacitor
C. Ceramic capacitor
D. Paper capacitor
The presence of an uncharged conductor near a charged one increases the__________?
The presence of an uncharged conductor near a charged one increases the__________?
A. charge of the charged conductor
B. capacity of the charged conductor
C. potential of the charged conductor
D. all of the above
Which of the following statements is correct ?
Which of the following statements is correct ?
A. Mica capacitors are available in capacitance values of 5 to 20 uF
B. Air capapitors have a black band to indicate the outside foil
C. Electrolytic capacitors must be connected in correct polarity
D. Ceramic capacitors must be connected in correct polarity
For a good 0.05 uF capacitor ohmmeter reading should___________?
For a good 0.05 uF capacitor ohmmeter reading should___________?
A. show low resistance momentarily and back off to a very high resistance
B. show high resistance momentarily and then a very low resistance
C. go quickly to 50 ohm approximately and remain there
D. not move at all
The ohmmeter reading for a short circuited capacitor is____________?
The ohmmeter reading for a short circuited capacitor is____________?
A. infinity
B. few kilo ohms
C. few megohms
D. zero
An electrolytic capacitor is generally made to provide__________?
An electrolytic capacitor is generally made to provide__________?
A. low capacitance
B. fixed capacitance
C. variable capacitance
D. large value of capacitance
A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be________________?
A positive and a negative charge are initially 50 mm apart. When they are moved close together so that they are now only 10 mm apart, the force between them will be________________?
A. 5 times smaller than before
B. 5 times greater than before
C. 10 times greater than before
D. 25 times larger than before