Small amounts of electrical current are measured in milliampere (mA). How many milliampere are there in 0.25 A ?
(a) 2.5 mA
(b) 25 mA
(c) 250 mA
(d) 2500 mA
Assertion (A) : Copper is used to make electric wires.Reason (R) : Copper has very low electrical resistance.
Both (A) and (R) are true and (R) is the correct explanation of (A).
Both (A) and (R) are true but (R) is NOT the correct explanation of (A).
(A) is true but (R) is false.
(A) is false but (R) is true.
Both (A) and (R) are false.
Assertion (A) : Insulators do not allow the flow of current through themselves. Reason (R) : They have no free charge carries.
If both (A) and (R) are true and the (R) is the correct explanation of (A).
If both (A) and (R) are true but (R) is not a correct explanation of (A).
If (A) is true and (R) is false.
If both (A) and (R) are false.
Water : pipe : : Electric current : __________
Milli ampere : micro ampere : : 10-3A : ______________
Assertion (A) : Insulators do not allow the flow of current through themselves. Reason (R) : They have no free charge carries.
If both (A) and (R) are true and the (R) is the correct explanation of (A).
If both (A) and (R) are true but (R) is not a correct explanation of (A).
If (A) is true and (R) is false.
If both (A) and (R) are false.
Water : pipe : : Electric current : __________
S.I. unit of Electrical conductivity of a conductor is ______________
Siemens/metre (s/m)
Ammeter
metere
meter
Electron flow is in the .... direction to conventional current flow.
In the circuit shown, which switches (L, M or N) must be closed to light up the
.... is a safety device which is used in household wiring and in many appliances.
Length : metre scale : : Current : __________
Milli ampere : micro ampere : : 10-3A : ______________
Length : metre scale : : Current : __________
In the circuit diagram below, 10 units of electric charge move past point x every second *What is the current in the circuit ________.*
(a) 10 A
(b) 1 A
(c) 10 V
(d) 1 V
Assertion (A) : Insulators do not allow the flow of current through themselves. Reason (R) : They have no free charge carries.
If both (A) and (R) are true and the (R) is the correct explanation of (A).
If both (A) and (R) are true but (R) is not a correct explanation of (A).
If (A) is true and (R) is false.
If both (A) and (R) are false.