Select the correct statements in the following list. An electric current produce
ID: 1380230 • Letter: S
Question
Select the correct statements in the following list.
An electric current produces magnetic field.
A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the capacitor is zero.
A particle carrying a charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been one-half the original radius.
As more and more capacitors are connected in parallel, the equivalent capacitance of the combination decreases.
As more resistors are added in parallel to a constant voltage source, the power supplied by the source decreases.
A)A charged particle moves across a constant magnetic field. The magnetic force on this particle causes the particle to accelerate.B)
An electric current produces magnetic field.
C)A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the capacitor is zero.
D)If you connect two identical storage batteries together in parallel, and place them in a circuit, the combination will provide twice the voltage.
E)
A particle carrying a charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been one-half the original radius.
F)As more and more capacitors are connected in parallel, the equivalent capacitance of the combination decreases.
G)A horizontal wire carries a current straight toward you. From your point of view, the magnetic field caused by this current circles the wire in a counter-clockwise direction
E)
As more resistors are added in parallel to a constant voltage source, the power supplied by the source decreases.
F)The voltage across the terminals of a battery when a current flows is called the electromotive force.
Explanation / Answer
A) Force due to magnetic field causes particle to accelerate - TRUE
B) TRUE.. A current carrying wires produces magnetic field
C) At the moment contact is made with the battery, voltage across resistor = battery voltage . Hnce voltage across capacitor = 0 , TRUE
D) Since theey are connected in parallel , voltage will be same , FALSE
E) mv^2 /r = B q v , So r = mv / Bq , radius is inversly proptional to charge. TRUE
F) IF capacitors are added in parallel , equivalent capacitance increases , FALSE
G) From right hand thumb rule , magnetic field caused by this current circles the wire in a counter-clockwise direction , TRUE
H) Power supplied by source would be same , Power in each resistor would decrease as we add resistors - FALSE
I) If internal resistance is present , electromotive force is different from voltage across the terminals of a battery when a current flows - FALSE
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Answers
A) A charged particle moves across a constant magnetic field. The magnetic force on this particle causes the particle to accelerate.
B) An electric current produces magnetic field.
C) A resistor and a capacitor are connected in series to an ideal battery of constant terminal voltage. At the moment contact is made with the battery, the voltage across the capacitor is zero
E) A particle carrying a charge of +e travels in a circular path in a uniform magnetic field. If instead the particle carried a charge of +2e, the radius of the circular path would have been one-half the original radius
G) A horizontal wire carries a current straight toward you. From your point of view, the magnetic field caused by this current circles the wire in a counter-clockwise direction
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