Monday, March 25, 2013

CBSE Class 10 - CH 12 - Electricity (MCQs)

Electricity
An electric circuit

MCQs

Q1: The SI unit of electric charge is __________

(a) volts (V)
(b) ampere (A)
(c) coulomb (C)
(d) tesla (T)


Q2: By convention, the charge on a glass rod that has been rubbed with silk is called

(a) Positive
(b) Negative
(c) either positive or negative
(d) none of these


Q3: Two charged bodies having equal potential are connected through a conducting wire, in this case

(a) current will flow
(b) current will not flow
(c) cannot say
(d) current will flow if a resistor is also connected.



Q4: The Potential Difference between two terminals can be measured by _________

(a) an ammeter.
(b) a voltmeter
(c) an ohm-meter
(d) a rheostat


Q5: The net charge flowing through a cross section of a conductor in unit time is known as

(a) ampere
(b) volt
(c) resistance
(d) electric potential


Q6: Which of the following correctly represents the relation among Charge (Q), Potential difference (V) and  Work done (W)

(a) V = W × Q
(b) W = V / Q
(c) V = Q / W
(d) V = W / Q


Q7: The voltmeter is always connected in _________ across the points between which the potential difference is to be measured.

(a) series
(b) parallel
(c) either series or parallel
(d) none of these


Q8: How many electrons will be there in 1.6C charge?

(a) 1017
(b) 1018
(c) 1019
(d) 1020


Q9: According to Ohm's law,

(a) The resistance increases with the increases in current.
(b) The resistance increases with the increases in voltage.
(c) The current increases with the increases in voltage.
(d) The resistance and current both increases with the increases in voltage.


Q10: A voltmeter is used to measure
(a) potential difference
(b) electric current
(c) electric power
(d) resistance


Q11: On which of the following no “plus” or “minus” sign is marked
(a) a battery
(b) an ammeter
(c) a voltameter
(d) a resistor


Q12: A galvanometer is used to 

(a) measure potential difference
(b) detect direction of current
(c) measure amount of current flowing
(d) measure electric power of the circuit


Q13: An electric fuse is based on
(a) the heating effect of the current
(b) the chemical effect of the current
(c) the magnetic effect of the current
(d) none of these


See also Electricity Q & A

Answers:
1: (c) coulomb (C)
2: (a) Positive
3: (b) current will not flow
4: (b) a voltmeter
5: (a) ampere
6: (d) V = W / Q
7: (b) parallel
8: (c) 1019 [Hint 1C = 6.25 × 1018electrons ⇒ 1.6C will have  = 1.6 × 6.25 × 1018]
9: (c) The current increases with the increases in voltage.
10: (a) potential difference
11: (d) a resistor
12: (b) detect direction of current
13: (a) the heating effect of the current

2 comments:

  1. this was really helpful.thanks a lot......

    ReplyDelete
  2. THIS WAS NOT RELATED TO ALL THE INFORMATION

    ReplyDelete