When the wavelength of light is its frequency double frequency and speed are ene

Question

When the wavelength of light is its frequency double frequency and speed are energy double speed is The similarity between and is that both have the same wavelength both have the same energy both have the same frequency. A current-carrying wire is in a magnetic field with the direction of the same as that of the field. The wire tends to move parallel to the field The wire tends to move perpendicular to the field The wire tends to turn until it is perpendicular to the field The wire has no tendency to move or to turn The current in a 12- ohm toaster operated at 144 V is 12 A 10 A 228 A The voltage needed to produce a current of a 2 A in a resistance 20 V 39.5 V 40.5 V The resistance of a light bulb that draws a current of 2A when 9-V battery is 18 ohm 11 ohm 7 ohm 4.5 ohm The current in a 600-W 240-V electric cooker is 1/4 A 4 A 2.5 A

Explanation / Answer

25 D
26 C
27 D
28 I=V/R=144/12 =12 A
29

30 R=V/I=9/2 =4.5 ohm

31 I=240/600 =0.4 A

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