If the voltage across the filament is increased, the cutoff wavelength

If the current in the circuit for heating the filament is increased, the cutoff wavelength

If the current in the circuit for heating the filament is increased, the cutoff wavelength

If the current in the circuit for heating the filament is increased, the cutoff wavelength

When filament current is increased

If the potential difference applied to tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength

If the potential difference applied to tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength

If the potential difference applied to tube is doubled and the separation between the filament and the target is also doubled, the cutoff wavelength