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I need the answers to these ten questions. I have attached them below. Please answer them all. Many many thanks in advance!!

When a torch is brought 2 times closer, how many times brighter will it appear? O 16

A diffraction grating that contains 650472 lines/m is illuminated by monochromatic light (λ-632.8 nm) from a helium-neon laser directed perpendicular to the surface of the grating. What is the angle for the second order maxima to occur? 24° O 45 48

Two resistors 10 Ω and 5 Ω are connected in parallel across a 15 V battery. What is the potential difference across the 10 Ω resistor? 10 V 15 V O 20 V

A current of 60 mA passes through a loudspeaker of resistance 6 Ω. What is the potential difference across the resistance of the loudspeaker? 36.0 V 10.0 V O 0.36 V 0.10 V

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