charge q at a point in an electric field, the field strength E at the point is (
ID: 1874902 • Letter: C
Question
charge q at a point in an electric field, the field strength E at the point is (b) independent of charge q (c) a property of the field created by other charges (d) all of the other statements provided here. 2) Lines of force (a) are a concept to visualize the strength and direction of an electric field. (b) are not real "lines" (c) start at positive charges and end at negative charges. (d) all of the other statements given here. 3) If you are not sure of the range of the current in a circuit you are about to measure, you should set the ammeter to (a) its largest range. (b) its smallest range 4) A voltmeter should be connected (a) in series with the resistor or light bulk across which the voltage is being measured. (b) in parallel with the circuit element across which the voltage is being measured. 5) The total resistance of two resistors connected in parallel is (a) larger than the resistance of any of the two. (b) smaller than the resistance of any of the two. (c) between the resistances of the two 6) If a resistor has these color bands: brown red- orange-gold, what is its resistance? (a) 12.3 ohm ± 5% (b) 123 ohm ± 5% (c) 1.2 x 10^3 ohm ± 5%. 1.2 kilo-ohm ± 5% (d) 12 x 1013 ohm ± 5%-12 kilo-ohm ± 5%Explanation / Answer
1
If the ewlectric field at a point is E, then the force experienced by a charge q at that point due to the electric field E is
F=qE. So the correct option is (a) F/q
2
LInes of force are ofcourse a concept used to visualize the strength of af anelectric field and direction of electric field. The strength at a point is proportional to the Number density of field lines and the direction is same as that of the tangent vector drawn in the direction of arrow on the line of force at that particular point.
3
The ammeter should be set to its largest range so that the range the unknown current can have is covered and measured.
4
Voltmeter is always connected in parallel to the circuit element for which the voltage is to be measured.
5
The total or equivalent resistance of resistors connected in series is simply equal to their sum. As such, the total resistance is larger than the resistance of any of the two.
6
As per the 4 Band Resistor Color Code of resistors the resistance is 12 kilo-Ohm +/- 5%.
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